Nearly all of the House Republicans who voted to impeach Mr. Trump have either already been formally censured by local branches of the G.O.P., face upcoming censure votes or have been publicly scolded by local party leaders. Efforts across the country to punish these lawmakers offer vivid illustrations of the divisions cleaving a party that has been shut out of power…

For Mr. Katko and Representatives Adam Kinzinger of Illinois, Anthony Gonzalez of Ohio, David Valadao of California, and Fred Upton and Mr. Meijer of Michigan, all Republicans who voted for impeachment and hail from states likely to lose seats in this year’s redistricting process, the shapes of the districts they may seek to represent in 2022 have yet to be determined.

Democratic state legislators in New York and Illinois could draw Mr. Katko and Mr. Kinzinger into districts represented by fellow incumbent Republicans, potentially cutting off a path for a Trumpian insurgent, while commissions will determine district lines in California, Michigan and Ohio.